Zum Wechselverformungsverhalten der Magnesiumbasislegierung AZ31

Jägg, S.; Zinn, W.; Scholtes, B.

doi:10.1002/(sici)1521-4052(199902)30:2<65::aid-mawe65>3.3.co;2-f

Cited by 3 publications

(5 citation statements)

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“…2d) and distinct formation of twins during compression leading to higher plastic deformation in contrast to tension, as is well known for magnesium alloys. [20] The pronounced difference in plastic strain response between tension and compression was also observed under cyclic loading.…”

Section: Monotonic Deformation Behaviourmentioning

confidence: 90%

Monotonic and Cyclic Deformation Behaviour of the SiC Particle‐Reinforced Aluminium Matrix Composite AMC225xe

2010

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In recent years, the reinforcement of aluminium alloys with ceramic particles has provided a new family of composite materials; these are applied, for example, in structural components subjected to cyclic loads. [1] The particular attributes of aluminium matrix composites (AMCs) making them attractive for this use are the combination of high fatigue properties, high specific stiffness and relatively low cost, due to the application of conventional metal manufacturing techniques and machining processes. The most significant property improvement compared to conventional metals is the specific modulus. For steels as well as aluminium, magnesium and titanium alloys this ratio is about 26. In AMCs this ratio can be more than doubled by reinforcement with 50 vol.-% ceramic particles. But the reinforcement also leads to a reduction in ductility. For most structural applications the optimal particle reinforcement is between 15 and 25 vol.-%.There are potential applications for AMCs in the aerospace industry, for use in front of the compressor and in the fan bypass structure, where maximum service temperatures do not exceed 150 8C. Another potential area of application is the automotive industry, in which brake callipers and conrods for high performance Formula 1 and Indy racing vehicles are currently manufactured of high quality aerospace-grade aluminium alloy AA 2124 reinforced with 25 vol.-% ultra fine SiC particles, so-called AMC225xe. [2][3]

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Section: Monotonic Deformation Behaviourmentioning

confidence: 90%

Monotonic and Cyclic Deformation Behaviour of the SiC Particle‐Reinforced Aluminium Matrix Composite AMC225xe

2010

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“…At first, cyclic hardening was observed in pure magnesium by Kwadjo and Brown. [26] This effect was also found in some magnesium alloys, which are mainly based on the Mg-Al [4,14,17,19,23,27,28] or Mg-Li systems. [29,30] In further publications the attention is additionally drawn to different heat treatments and their microstructures.…”

Section: Reviewsmentioning

confidence: 99%

“…On the contrary, age-hardened alloys show a non-uniform behaviour: the cyclic loading can either lead to hardening or softening, depending on the type of the precipitates. [14,17,23,24,31] Age-hardened magnesium alloys based on the Mg-RE (rare earth) or Mg-Zn-system tend to show cyclic softening [31] due to the presence of coherent precipitates. [32] These precipitates can easily been cut by dislocations, therefore reducing the size of the precipitates, leading to cyclic softening.…”

Section: Reviewsmentioning

confidence: 99%

“…[17] This cyclic hardening effect has also been confirmed by cyclic stress-strain curves and/or hysteresis loops ( Fig. 5) [4,14,23,24] and happens within approximately the first 10,000 cycles. [14,17] A generalisation of the cyclic behaviour of magnesium alloys is not possible due to the differences in microstructure of the alloy systems and their heat treatment.…”

Section: Reviewsmentioning

confidence: 99%

“…Total, elastic and plastic strain amplitudes of AZ91 at 20 C and 130 C [23]. Hysteresis loops, showing a reduction in plastic deformation (cyclic hardening) of AZ31 between the cycles 10 and 20,000 [14].…”

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Fatigue of Magnesium Alloys

Potzies¹,

Kainer²

2004

Adv Eng Mater

174

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Magnesium alloys show a high specific strength and are therefore increasingly used for light‐weight constructions in transportation industry.[1,2] To predict the behaviour of the material under the influence of cyclic loading it is vital to understand the fatigue behaviour of magnesium alloys. Only when understood properly, it is possible to fully apply the potential weight reduction by using magnesium alloys. A very important aspect in fatigue of magnesium alloys is the influence of a corrosive media and elevated temperatures, of which both are relevant in automotive applications. These two factors tend to have deleterious effects on magnesium alloys and therefore also have to be considered in investigations on the fatigue behaviour of magnesium alloys.

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